Sources confirmed to FoxNews.com that the apartment being searched in connection to the bombings is on the fifth floor of the building.

A source close to the investigation confirms to FoxNews.com the man whose apartment was searched is considered a person of interest in the case, and is the same person of interest Fox News confirmed earlier authorities are guarding at a local hospital.

The source confirmed to FoxNews.com that the person of interest is Abdul Rahman Ali Alharbi, a 20-year-old Saudi. His Facebook page identifies him as a current or former student at the New England School of English. He is believed to have entered the country on a student visa.

UPDATE: FOX News reported that the Saudi man is not a suspect in the blast.